fix: generate publish wheels for target platforms

[tomatotomata]

Summary

• add the Linux x86_64, Linux aarch64, macOS aarch64, and Windows x86_64 targets used by the publish dependency hub
• keep the existing per-platform requirements files unchanged

Issue #3911 reports that requirements_by_platform only materializes wheels for the platform that evaluates the module extension. I was thinking the smallest fix is to declare the four platforms already represented by the publish requirement files. The Windows target was added after Buildkite's Windows Bazel 8 and 9 jobs exposed that omission.

Validation

• git diff --check passed
• Buildifier formatting passed
• Bazel is not installed in this environment, so I could not run the repository analysis matrix
• Buildkite's Linux and macOS configurations passed on the first follow-up run; the Windows configs are covered by the windows_x86_64 follow-up commit and are awaiting their new run

The issue maintainer said they are happy to accept a PR for this change. Let me know what you think.

[aignas]

I think the correct thing to do here would be this:

Suggested change

	"linux_x86_64",
	"{os}_{arch}",
	# Below platforms are added to support cases where we are using
	# RBE to build and push the wheels
	"linux_x86_64",